No, he just stole my heart

On Tuesday this week, burglary entered our working place and stole rhinoceros's horns from the museum. Next day, three news articles cynically reported that you can freely enter the building because there is no security system! Those horns estimated to be worth about over 5,000,000 yen! The culprit seemed to a kind of mafia, traveling around the whole country to rob valuables and sell them. I noticed that last week a stranger with a beard and wearing a black jacket was checking each floor by the elevator but never entered the rooms. Several people witnessed the guy but nobody did not care about him. Therefore, we were really careless to realize any persons could get into the building and steal something even in the daytime. At this moment, an unrelated phrase came to mind, ''memento mori''.